Ceramic Machine Screw (Cross-Recessed Head) RA-SR/RA-R

[Nominal thread (M)] 4(0.7) / 5(0.8)
[Silicone rubber washer (SRW)]
[Material] Silicone rubber
[Color] Translucent
[Hardness] 50° (Durometer type A) 49° (IRHD reference value)
[NBR washer (RW)]
[Material] NBR
[Color] Black
[Hardness] 70° (Durometer type A) 63° (IRHD reference value)